Includes the scores for both Bun No.2 and Volo Solo. Much of the spiral bound book is text, however, including an introduction, the working notes for Treatise, a "Resume of pre-publication perfomances" of Treatise, plus 2 essays ("On the Role of the Instructions in the Interpretation of Indeterminate Music" and "Towards an Ethic of Improvisation") and a short essay by Michael Chant called "Responses to Virtues, for Theorizing."